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[OpenStack Infra <1311987@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/100698
Committed: https://git.openstack.org/cgit/openstack-dev/devstack/commit/?id=cd1cf1b41753a0d05a814f2a7817522b7f7e7b91
Submitter: Jenkins
Branch:    stable/icehouse

commit cd1cf1b41753a0d05a814f2a7817522b7f7e7b91
Author: Adam Gandelman <adamg@xxxxxxxxxx>
Date:   Mon Apr 28 14:06:42 2014 -0700

    Bump minimum default RAM for Ironic nodes to 1GB
    
    Set the default RAM for Ironic BM VMs to 1GB to ensure DIB produced deployment
    ramdisks function correctly across older and newer kernels, regardless of
    rootfstype.
    
    Change-Id: Ifc15a4430aa63c3599e7fd76f5116dc7b728ead0
    Closes-bug: #1311987
    (cherry picked from commit 74eafa4b49dcf2f76b7627739d26e457fa1775db)


** Tags added: in-stable-icehouse

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https://bugs.launchpad.net/bugs/1311987

Title:
  deploy-ironic ramdisks do not boot:  Failed to execute /init (error
  -28)

Status in devstack - openstack dev environments:
  Fix Released
Status in Openstack disk image builder:
  Triaged
Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  The default ubuntu release for ramdisks was bumped to Trusty
  https://review.openstack.org/#/c/88384/  Ironic + devstack deployments
  stopped functioning.  The ramdisk fails to run init, crashing with the
  following error:

  [   23.154016] Failed to execute /init (error -28)
  [   23.154909] Starting init: /sbin/init exists but couldn't execute it (error -28)
  [   23.156388] Starting init: /bin/init exists but couldn't execute it (error -28)
  [   23.157490] Starting init: /bin/sh exists but couldn't execute it (error -28)
  [   23.160313] Kernel panic - not syncing: No working init found.  Try passing init= option to kernel. See Linux Documentation/init.txt for guidance.
  [   23.164146] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.13.0-24-generic #46-Ubuntu
  [   23.164146] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
  [   23.164146]  0000000000000000 ffff88001a3a9ec0 ffffffff81715a64 ffffffff81a39f38
  [   23.164146]  ffff88001a3a9f38 ffffffff8170ec65 0000000000000008 ffff88001a3a9f48
  [   23.164146]  ffff88001a3a9ee8 ffffffff81a39a38 0000000013981396 0000000000001396
  [   23.164146] Call Trace:
  [   23.164146]  [<ffffffff81715a64>] dump_stack+0x45/0x56
  [   23.164146]  [<ffffffff8170ec65>] panic+0xc8/0x1d7
  [   23.164146]  [<ffffffff81703f40>] ? rest_init+0x80/0x80
  [   23.164146]  [<ffffffff81704062>] kernel_init+0x122/0x130
  [   23.164146]  [<ffffffff8172637c>] ret_from_fork+0x7c/0xb0
  [   23.164146]  [<ffffffff81703f40>] ? rest_init+0x80/0x80
  [   23.164146] general protection fault: fff2 [#1] SMP
  [   23.164146] Modules linked in:
  [   23.164146] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.13.0-24-generic #46-Ubuntu
  [   23.164146] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
  [   23.164146] task: ffff88001a3a0000 ti: ffff88001a3a8000 task.ti: ffff88001a3a8000
  [   23.164146] RIP: 0010:[<ffffffff8170ed30>]  [<ffffffff8170ed30>] panic+0x193/0x1d7
  [   23.164146] RSP: 0000:ffff88001a3a9ed0  EFLAGS: 00000246
  [   23.164146] RAX: 0000000014a814a8 RBX: ffffffff81a39f38 RCX: 0000000000000854
  [   23.164146] RDX: 00000000000014a8 RSI: 0000000000000000 RDI: 0000000000000046

  #define ENOSPC      28  /* No space left on device */

  Setting DIB_RELEASE=saucy fixes the issue.    A saucy ramdisk is 83M
  compressed, 238M decompressed.  trusty ramdisk is 87M compressed, 245M
  decompressed.

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